Farm Equipment - Locked up B

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Locked up B

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=169321
Printed Date: 26 Aug 2025 at 11:39pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Locked up B

Posted By: MotorCityBear
Subject: Locked up B
Date Posted: 21 Mar 2020 at 7:53pm

I have a 1953 B that has been sitting for a few years. The plan was to restore it when I retire. I started it frequently but I think the gas went bad and it stopped running. The carb likely needs to be cleaned also. When that happened I hand cranked it every month to turn the engine over. I turned it over freely in the last month or two.

So I finally retired last month. Woo-Hoo!!!

Now the engine won’t turn over when I use the hand crank.

So I took out the spark plugs and put some ATF in the cylinders and took the starter off. Then I jacked up the back end, put the transmission in gear and turned the rear tires thinking it would free up the engine.

The rear wheels spun freely but when I look in the hole where the starter goes the flywheel is not moving.

Where do I begin?

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Rob
1953 AC B
Kubota L3901
Blairsville, GA

Replies:

Posted By: HD6GTOM
Date Posted: 21 Mar 2020 at 7:59pm

sounds like you have a clutch problem or something broken in the tranny or rear end.

Posted By: MotorCityBear
Date Posted: 21 Mar 2020 at 7:59pm

I did put it in gear

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Rob
1953 AC B
Kubota L3901
Blairsville, GA

Posted By: WF owner
Date Posted: 21 Mar 2020 at 8:22pm

If both rear tires are off the ground, turning one tire will only turn the opposite tire the opposite way. Let it down and try to rock the entire tractor. If it turned freely a couple months ago, you have a good chance of freeing it up.

I made a fitting that threads into a spark plug hole and has an air fitting on it. I remove the valve cover and loosen the rocker arm shaft so all the valves are shut, then hook an air hose to it, I set the regulator on the air hose to about 75 psi, and leave it for a day. It helps push the solution down the cylinders. I keep changing cylinders and trying it until it loosens.

Good luck !

Posted By: MotorCityBear
Date Posted: 21 Mar 2020 at 8:34pm

That makes sense, I will try that tomorrow. Hopefully it breaks free.

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Rob
1953 AC B
Kubota L3901
Blairsville, GA

Posted By: MACK
Date Posted: 21 Mar 2020 at 9:50pm

Just Jack one wheel off the round. MACK

Posted By: Gerald J.
Date Posted: 22 Mar 2020 at 10:26am

The shop manual could help:

http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf

Gerald J.

Posted By: Ted in NE-OH
Date Posted: 22 Mar 2020 at 10:29am

If you use the "rock the rear tire approach" put it into 3rd gear

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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914

Posted By: ac fleet
Date Posted: 22 Mar 2020 at 11:57am

Hook a tractor or truck on each end and jerk it back and forth with tractor in 3'rd gear , or use skidloader if you have access to one. ---Cant be stuck too bad.

One guy swears that he made adapters to go in spark plug hole , found closest piston to the top, installed adapter and pumped it full of grease and got an engine loose that way,----NOT something I would do and not even sure it would work!

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http://machinebuildersnetwork.com/

Posted By: MotorCityBear
Date Posted: 22 Mar 2020 at 4:24pm

So I just left both wheels on the ground and did the rocking thing and it worked. Now it turns over easily with the hand crank.

On to that dirty carb.....

Thanks for the help.

Gerald thanks for the link!!

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Rob
1953 AC B
Kubota L3901
Blairsville, GA